Barcode prefixes for each institution

31194: American 

 35063: American University Washington College of Law 

 30530: Catholic 

 35127: Catholic Law 

 32884: Gallaudet 

 32777: George Mason 

 39020: Georgetown 

 30770: Georgetown Law 

 32882: George Washington 

 37010: George Washington University Himmelfarb Health Sciences (some volumes have WRLC item barcodes) 

 35115: George Washington Law 

 35969: Howard 

 32883: Marymount 

 37090: Trinity 

 32105: UDC 

 30478: UDC Law 

 37010: WRLC